It's true. Many car manufacturers have been launching cars in white for a year or more now. If you Google "cars, white is the new black" you'll see what I mean. I still prefer black though -I'm with Henry Ford on this one.
Car colours as Black, blue, silver and grey have been popular since decades and that is probably never gonna change.
I agree that white is (or better was cause popularity is already dropping) the new black but this could change very quickly and then it will be harder to sell or only for a lower price.
White has also been popular in the seventies and eighties but always only for a few years and this could be the case this time too.
Besides all I wrote above: I love white (but haven't chosen it myself because I have to drive this car for 4 years and don't believe I would still like it after 2 years or so)!!!